public void ReadToFolder(PackageDataStream readStream, string rootDirectory)
{
if (readStream == null)
{
throw new ArgumentNullException(nameof(readStream));
}
if (rootDirectory == null)
{
throw new ArgumentNullException(nameof(rootDirectory));
}
rootDirectory = RemoveTrailingSlashIfPresent(rootDirectory);
// ensure directory exists
var rootDirectoryInfo = new DirectoryInfo(rootDirectory);
rootDirectoryInfo.Create();
var version = serializer.Deserialize <ClientVersion>(readStream);
compatibilityChecker.ThrowIfNotCompatibleWith("Package", version);
var foldersStack = new Stack <string>();
while (true)
{
// read entry
var entry = serializer.Deserialize <PackageEntry>(readStream);
if (entry == null)
{
throw new InvalidOperationException("Cannot deserialize package entry.");
}
// final entry
if (entry.Name == null)
{
// really end of stream?
if (readStream.Position != readStream.Length)
{
throw new InvalidOperationException("Unexpected stream end.");
}
// final entry should pop to root directory
if (entry.PopDirectories != foldersStack.Count)
{
throw new InvalidOperationException("Invalid number of directory pops on final entry.");
}
return;
}
EntriesCount++;
// get to correct directory
for (int i = 0; i < entry.PopDirectories; i++)
{
if (foldersStack.Count == 0)
{
throw new InvalidOperationException("Invalid number of directory pops.");
}
foldersStack.Pop();
}
var currentFolder = foldersStack.Count > 0 ? foldersStack.Peek() : rootDirectory;
var path = Path.Combine(currentFolder, entry.Name);
// is it directory?
if (entry.Attributes.HasFlag(FileAttributes.Directory))
{
if (entry.FileSize != null)
{
throw new InvalidOperationException("File size is expected to be null for directory entry.");
}
var dir = new DirectoryInfo(path);
if (dir.Exists)
{
throw new InvalidOperationException($"Folder \"{dir.Name}\" already exists. Full path: {dir.FullName}");
}
dir.Create();
ApplyAttributes(dir, entry);
foldersStack.Push(dir.FullName);
continue;
}
// or is it file?
if (entry.FileSize == null)
{
throw new InvalidOperationException("File size is null.");
}
using (var fileStream = new FileStream(path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None, DefaultBufferSize))
{
fileStream.SetLength(entry.FileSize.Value);
if (entry.FileSize.Value > 0)
{
// write content
readStream.CopyStream(fileStream, DefaultBufferSize, entry.FileSize.Value);
}
}
var fileInfo = new FileInfo(path);
ApplyAttributes(fileInfo, entry);
}
}
